Appliance for mixing materials



Feb. 3, 1942. A, s OONE 2,272,125

APPLIANCE FOR MIXING MATERIALS ARTHUR 6'. 00A/f A TTO/WVE Y Feb. 3, 1942. A. s. LooNE PPLIANCE FOR MIXING MATERIALS 2 Sheets-Shea?l 2 Filed Sept. 29, 1939 IIIIIII/ Patented Feb. 3, 1942 Y v lAPPLIANCEronivntxlna Mariannes Arthur'stenley Len Wales, Australia Application september 29, iafseriem 1 e V- .Y 'kIn Australia January 14;,193

z Claims'.r (01. rpit@ TheV presentA invention relates f to mechanically handidriven mixing appliancesthat are 'used for thelp'rep'aration of certain foodstuffs, such as e; einem tra seeth' driving vg'earfn y y ther other halff- |5176 being seatedupon' it.' yEach cakes', puddings, .custards, etc. "The invention n may'v also beeused'y by 'druggsts forv mixing ointments; pastos, Yand other preparations. 'Y

' Ithasbeen found' thatrwith'certain makes 'of mixing` appliances when in use the ingredients adhere to .the wall of the `mixing bowl which v necessitatesstoppage'of the'process and consequentrlossof timefin order to free" the mixture Vfrom thesbowl. 1 e

Inithis invention' means are provided whereby rtllemixturieis. mechanically wiped from the-wall of the`A bowl duringthel process of mixing and' returned; tothe. central beatersfor mixers. -s

The vappliance: is 1 simple 'tol construct havin two' oppositelypositonedfsemiycylindrical exten: sions IBand-lfia the pairfo'ffextensionstllia-being axiall'yboredva df" internally screwthreaded;

sitior afshortkslidableferrulefI`1is slid over yeach pairiaridlthtwohalvesg StL-'+I a're thus fastened together. vThe engagin facesv ofthe two halves l of fthe! gear 'box,...are respectively .gvrooved, and

beaded: iat 2:6 f and; 25a so; tnatrwhen 'a suitable -`rpla-cerifbetween'them' an ei1 together nby .,tl'ieiferrulesfl A|11y 'Integral with and within the lower han l5 of theboxis aeentrauy r positioned tubular boss I 8'thatisinterna1ly screw butA fewA working parts,andsimple'meansk havebeen', devised' for the 'easy `removal ,and replacing of' theipa'rts that'require-Yto becleaned, after use. The driving gear works. ini an oil. bath lenclosed withinz'ai box iandfgmeans are provided to preventk thefescape. ofjlthe oil.: t Y

Whilst the appliancev in its simplest forrnfi'srare"v ranged to beY driveniby.` hand it may alsobe driven by va suitable 1 motor 'without departing fromv the' spirit of theynvention. t e e a The, invention will now? be fullyr described and referencer made toY .the laccompanying drawingsin Figure 1Y isaa ycentral sectional elevation show-r' y ing, onefforminiwhich a mixing appliance and bowlfjmaybe- 'constructed according to this" invention. v

-lligurev2-` isa plan View partly in section offFig- Inlorder to ensureethe more V'com-plete mixing l *of-'"materialsf'two" vsets of' beaters 2| and 2.2- are employed'` rand! the driving fgear is `v arranged' to drive. thebe tersV 2l 'at ,affasteri speed than the beaters 22a ds'craper'sf23`. One method of ob- Vtaining theld'ifierentspeedsfis'fshown` on the drawings and-'isas follows: l

The framef'lfisprovid d" witha standard 24 ure-:1 but with thecover ofthe driving gear box removed.

Figure 3 is: a central Vertical. section ofFigu'rle 1, but with the scraper arms removed.

Figure 4 is a perspective view of. the beatersl A and scrapers disconnected from the-driving gear and removed from the bowl;

According vto the construction shown in the accompanying drawings the mixing appliance yis mounted'upon a platform or frame-IU which is seated upon a suitable'bowl of glass or other material. The platform or frame is provided with a number of stops l2 on its underside such stops i being positioned so that they impin'ge vagainst the inner face of the rim of the bowl and a spring clip I3 adapted to engage with the lip M `of the bowl Il is also provided in order to assist .t0 maintain the frame i D in position upon thel bowl.

. The frame I may be of cast or stamped metal Y and is shaped'so thatr the lower half l5yof the which/af sleeve 251'A passes; 'thejiinner end A`of suoli sleeve 1 being: externally screw' threaded f to,v en` vgage with'.v the internal:` screw threads.: on `:the two semiecylindrical'rextensionsi l'aefi z'They sleeve` 25 n .forms ya.;bearing1-forfahorizontalidrivingff'sliaft` 21 to the' outer end of which is'secured a boss 28 that-is provided with a'transverse hole through which a crank29 is passed and secured by means of a set screw 30 that engages with any one of a plurality of notches 34|in the radial arm of the crank 29 in order to provide a variable stroke for thecra'nlr.` 'Thecrank 29 will be provided with a suitable handle 32 'whereby it may be manually drivenbut 'othermeans may be employed in order to enablethe shaft 21 tobepower driven. The inner t end'of the shaft 21 projects into the box Ilia-+15 andto itarev rigidly secured `.a crown [wheel 33' and pinion 34 lby means'v of a crossv pin 35. u, v "j v The horizontal shaft y21 transmits motion to the Vertical shaft 20 through the crown wheel 33 may-jbfef rigidly secured' thereto;

that meshes with a bevelled gear wheel 36 that is rigidly secured to at or near the upper end of the vertical shaft 20 by a cross pin 31 or other suitable means. Slower motion is transmitted from the horizontal shaft 21 to the sleeve shaft 38 through the pinion 34 and a crown wheel 39 that is rigidly secured near the upper end of the sleeve shaft 38. The sleeve shaft 38 is rotatably secured in a fixed sleeve bearing 40 that is provided with an external screw thread to enable it to be screwed into the screw threaded boss I8 and secured in position by a lock nut 4|. The sleeve shaft 38 is provided with a flange 42 at or about its centre, such flange abutting against the underneath face of the lock nut 4|. Upon the sleeve shaft 38 is a tubular boss 43 that is provided with the tooth members 44 of a dog clutch the co-acting members of which are Aformed in the underside of the flange 42 on the sleeve shaft.

the sleeve shaft 38 and upon the projecting end another boss 46 is positioned and retained by means of a spring grip 41 similar to the ring gripl 45 previously described. In order to cause the boss 46 to rotate with the shaft 20 the lower end of the latter is provided with a transverse slot to accommodate a cross pin 49 that is passed through the boss 46.

The scrapers 23 are rigidly secured to the boss 43 by brazing or in any other suitable manner and consist of radial arms having extensions that are bent to conform to the shape of the inner face of the mixing bowl so that when they are rotated with the boss they will do so between the outer members of the beaters 2| and the inner face of the bowl. They will lie in close proximity to the inner face of the bowl in order that as they rotate they will scrape off the material adhering thereto. As previously explained the scrapers rotate at a slower speed than the beaters 2| that are secured to and rotated by the boss 46, but the beaters 22 are secured by rivets or other means to the radial members of the Scrapers 23 and therefore rotate at a slower speed than the beaters 2|.. The beaters 2| are secured to the boss 46 by screws 5|) or other suitable means but it will be understood that whilst the shape and arrangement of the beaters may be as illustrated in the drawings other shapes and arrangements may be used within the ambit of this invention.

It will be understood that whilst the frame I0 has been mentioned in this specicaton and illustrated in the drawings it may be necessary to substitute a disc for the frame |0 in order to prevent any of the material being mixed from being thrown out of the bowl.

I claim: y

1. In an appliance for mixing materials, removable actuating means comprising a frame adapted to be removably seated on the top of a container, a sectional casing mounted on said frame, a tubular boss positioned centrally in the lower section of and extending into said casing, a sleeve bearing threaded through and secured in said boss, a rotatable sleeve shaft journalled in said sleeve bearing and extending below said frame, a rotatable Vdrive shaft journalled in and extending below said sleeve shaft, means housed within the casing for rotating said sleeve shaft and said drive shaft simultaneously, a hub journalled on the lower end of and having a driving connection with said sleeve shaft, an annular groove on said sleeve shaft registering with an annular groove in the inner wall of said hub, a spring grip ring housed in said grooves to maintain said hub in position on said sleeve shaft and permitting said hub to be forcibly slid off said sleeve shaft, a hub journalled on the lower end of and having a driving connection with said drive shaft, an annular groove on said drive shaft registering with an annular groove in the inner wall of said second hub, a spring grip ring housed in said grooves to maintain said second hub in position on said drive shaft and permitting said second hub to be forcibly slid off said drive shaft.

2. In an appliance for mixing materials, having stirring elements, removable means for actuating the stirring elements comprising a frame adapted to be seated on the top of a container, a gear casing formed in two sections mounted on said frame, each section being provided with semi-cylindrical extensions registering with each other, ferrules adapted to slide over the respective pairs of said extensions to hold said sections together and to be similarly removed when said sections are to be separated, a tubular boss positioned centrally in the lower section of said casing, a sleeve bearing threaded through and secured in said boss with a liquid tight flt, a rotatable sleeve shaft journalled in said sleeve bearing and extending below said frame, a rotatable drive shaft journalled in said sleeve shaft and extending below said sleeve shaft, means housed within the casing for rotating said sleeve shaft drive shaft.

ARTHUR STANLEY LOONE. 

